Direct acting indicating analogue electrical measuring instruments and their accessories - Part 2: Special requirements for ammeters and voltmeters

IEC 60051-2:2018 applies to direct acting indicating ammeters and voltmeters having an analogue display.

It also applies to:

？？？ ？direct acting indicating ammeters and voltmeters whose scale marks do not correspond directly to their electrical input quantity, provided that the relationship between them is known;

？？？ ？direct acting indicating ammeters and voltmeters and accessories having electronic devices in their measuring and/or auxiliary circuits.

This document does not apply to:

？？？ ？special purpose instruments which are covered by their own IEC standards;

？？？ ？special purpose devices which are covered by their own IEC standards when they are used as accessories.

IEC 60051-2:2018 cancels and replaces the fourth edition published in 1984. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

a)？？ ？updating of content in line with new editions of IEC 60051-1 and IEC 60051-9;

b)？？ ？addition of Annex A to specify the nonconformity classification of test item.

This International Standard is to be used in conjunction with IEC？60051-1:2016.